Rate-splitting in the presence of multiple receivers

Understand

In the presence of multiple senders, one of the simplest decoding strategies that can be employed by a receiver is successive decoding.

• In a successive decoding strategy, the receiver decodes the messages one at a time using the knowledge of the previously decoded messages as side information.
• Recently, there have been two separate attempts to construct codes for the interference channel using successive decoding based on the idea of rate-splitting.
• In this note, we highlight a difficulty that arises when a rate-splitting codebook is to be decoded by multiple receivers.